An explosion tore through a polling station in the southern Yemeni city of Aden on Monday and gunfire was heard shortly after the blast, an official said, a day before an election to replace Ali Abudllah Saleh, Yemen's ruler for three decades.
No casualties were reported.
"The explosion caused a big hole in the building's wall and shattered the window glass of nearby houses," the official said.
Millions of Yemenis will vote on Tuesday in a poll in which Vice President Abd-Rabbu Mansour Hadi is standing as the only candidate, after a year of protests and civil unrest.
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